replace -f[no-][un]signed-char logic in ccom with a simple switch. pcc deals in signed characters by default, and the front end will flick the switch as appropriate (either by default for machine or OS type, or by request from commandline)

Update man page. This is from Igor Sobrado via pcc-list. "style(9) patch for manual page" I also manually had to apply some of this as I had other changes. Basically, this just reorders content and also improves the synopsis. No content changes. Thank you Igor.